Bag



Aug. 27, 1946.

C. V. BRADY Filed Jan. 24, 1944 Patented Aug. 27, 1946 BAG Charles V.Brady, Webster Groves, Mo., assignor I to Bcmis Bro. Bag Company, St.Louis, Mo., a corporation of Missouri Application January 24, 1944,Serial No. 519,566

1 Claim.

1 I This invention relates to bags, and with regard to certain morespecific features, to a composite bag and cover construction.

Among the several objects of the invention may be noted the provision ofa more convenient bag and cover combination which may be handled as asingle unit during transportation to, and during filling operations by,the packer; the provision'of an article of the class described whicheliminates the necessityfor the packer telescoping' a filled bag withwhat has heretofore been called its overslip; the provision of anarticle of the class described in which the cover not only protects andstrengthens the bag after filling and closing, but also protects theempty bag before filling and strengthens it during filling; theprovision of an article of this class which adds to the strength of thebag when finally covered and .which reduces sifting from, and leakageinto the bag; and the provision of an article of this class which ismore economical than the separate bags and overslips heretofore used.Other objects will be in part obvious and in part pointed outhereinafter. I v

The invention accordingly comprises the elements and combinations ofelements, features of construction, and arrangements of parts which willbe exemplified in the structures hereinafter described, and the scope ofthe application of which will be indicated in the following claim.

In the accompanying drawing,.in which are illustrated several of variouspossible embodiments of the invention,

Fig. 1 is a plan view of one form of the invention shown in emptycondition; 7

. Fig. 2 is an enlarged brokensection, line 2-2 of Fig. 1;

Fig. 3 is a vertical section similar to Fig. 2 but showing a completeclosure of the bag and cover;

Fig 4 Ba detailed front elevation of an upper right-hand corner of thebag of Fig. 3, parts being broken away to show interior arrangements;

Fig. 5 is a view similar to Fig. 1, but showing a fragmentary upper endand illustrating an alternative construction;

Fig. 6 is an enlarged detail section taken on line 6-6 of Fig. 5; and,

Fig. 7 is a plan view of the Fig. 5 construction as filled and closed,parts being broken away to show interior arrangements.

Similar reference characters indicate corresponding parts throughout theseveral views of the drawing.

Heretofore it has been the practice to employ protective overslips forbags but to make the bags separate from the overslips. The packer of thebags received them separately from the taken on overslips, which wasunhandy. He then filed the bags and closed them or their filler valves.They were then telescoped into the overslips and the latter closed. Theoverslips were, prior to loading, provided with bottom seams and werelonger than the bags, which in eifect made of the overslips outsideprotective bags. The general purpose was to place the main protectivecharacteristics (strength, moisture and abrasion resistance) in theoverslip, while the inner bags were designed primarily for easy filling.To facilitate inserting in the overslip, the inner bag was necessarilysmaller in girth than the overslip and consequently took all of thestress exerted by the contents. The inner bag therefore requiredconslderable strength. In spite of this, it often broke during the roughhandling in packing. Since the overslips were made longer than theunfilled bags to enclose them end to end when filled, without anyprovision thereafter for eliminating slack space in the bags, a. slackpackage resulted.

Referring now more particularly to the drawings, my improvements on theabove will be described. Referring to Fig. 1, numeral I indicates afiat, tubular bag having lateral V-shaped, expansive gussets 3. This bagmay be single-ply or multi-ply as desired. At its upper right-handcorner it has an inturned portion 5 forming a self-closing. valve. Thevalve may be any of known types for the purpose. At its outer end thebag is closed by means of a V-shaped cover strip 1 sewn in place bystitching 9. The valve 5 will admit of the insertion of a filler tubeII, indicated by dotted lines.

At numeral I3 is shown a tubular cover, preferably made of multi-plymaterial open at its upper end I5. For strength a layer of fabricusually forms one ply of the cover. Before delivery to the packer, andwhile the tubes I and [3 are flat, the bag manufacturer telescopes thetwo sleeves I' and I3 to the extent that the bottom edge I! of sleeve Iis adjacent the bottom edge I9 of tube I3. At this time the tube I whichhas an overall flat width less than that of tube I3, is centeredlaterally in the tube, as shown. Then a V-shaped cover strip 2| isapplied over the edges I1, I9 and stitching 23 is applied through 2|, I1and I9, thus by means of a single seam making a closed bottom for theinner bag I and one for the outer cover I3.

As shown in Fig. 1 the open cover is shorter than the closed bag I, thusexposing the valve 5 for easy subsequent insertion of the filler tube bythe packer. The unitary flat assembly of bag and cover is delivered flatto the packer, as illustrated in Figs. 1 and 2. The packer inserts thetube I I in exposed valve 5 and fills the bag. This causes it to expand,the gussets 3 stretching. The girthwise perimeter of the bag I and thatof the cover I3 are proportioned so that as the bag fill out, the coverforms girthwise support against radial forces of the bag contents whenloaded, that is, the filled bag fills tht cover. After the filler tube 5has been withdrawn the valve 5 tends automatically to close in the knownmanner. Filling of the bag is carried out to a point somewhat below theupper edge [5 of the cover Hi. This leaves slack at the upper end of thefilled bag. This allows the closing seam I on the upper end of the bagto be rolled down one.

' pass through the walls of the inner bag and esor more times asindicated at numeral 25 in Fig.

3 and places the rolled upper edge of the bag I beneath edge l5. Thepacker then applies a V- shaped cover strip 21 and stitching 29, thusclosing the upper edges l5 of the cover. The seam thus formed may bedipped into wax 3! or the like for making completely moisture-proofclosure. The bottom seam 2|, 23 may also be dipped into wax forwaterproofing purposes as indicated at numeral 41 in 2.

It will be understood that the upper edge i5 of the cover may also beclosed by other means, such as by tying, metal stapling orthe like.Also, the seam i, 9 at the upper end of the bag I may be a pasted Orother seam, instead of the sewn seam shown; likewise the bottom seam 2i,23.

The roll .25 takes up the slack at the upper end of bag i, insurespermanent closure of the valve 5 and protects the stitching in the seam"I, 9 against sifting out of, or leakage into, the bag. The position ofthe seam 21,29 of the cover close to the roll insures that the roll willnot un- Wrap, and thus permanence of a tight pack condition. Therolled-down top 25 also adds to the strength of the bag closure seamwhen the bag is filled.

As above forecast, the inner bag I may be designed. more flexible foreasy filling and closing, while the outer cover is designed for moistureand abrasion resistance and'strength and may be stifier. Easy filling isalso enhanced by the fact that the bag initially extends above the coverto allow easy insertion of the filler tube I.

The invention provides for the packer a single organized unit forapplication to the filling machinery. He is relieved of the task oftelescoping the bag into the cover, this having been done by themanufacturer. At the same time, the use of a single seam for closingboth the bottom of the bag and of th cover effects a saving to themanufacturer.

Filling machine operations are oftenquite hard on bags and under theprior art method with the inner bag separately from the cover andapplied after filling the inner bag had no outer support during thefillin operation. Thus often under severe handling, breakage of theinner bag would occur during filling. The present invention obviatesthis by providing the surrounding support of the trong cover duringhandling when filling. It also protects the bag'before the fillingoperation.

By means of the present invention tighter girthwise fit may also beobtained between the bag and the cover because there is presented noproblem of telescoping the two after the inner bag has been filled. Withthe prior art process a package which was slack girthwise wasnecessitated, because the inner bag needed to be when filledsubstantially enough smaller than the cover to make telescoping easy andcommercially practicable. This is in addition to the rolling down of thetop of the inner bag and the holding of it by the closure seam 21, 29,which serves to make a tight endwise pack, because material in completeclosure by the packer. procedure in this case is the same as that above-A filler valve is shown at 35.

cape from the mouth of the cover before closure of the latter occurs.

It is to be understood that the provision of the valve 5 and thepreclosure of the upper end of the bag 1 at I, 9 by the manufacturer isoptional; and that the upper end of this bag I may be left valveless andopen for filling and Otherwise the described.

In Figs. 5-7 is shown another form of the invention in which'likenumerals designate like parts. In this casethe'inner bag l-A has nosideward' gussets. It is therefore made of about the'same width as thecover when the two are fiat, except for the slight difference in widthin favor of the cover required by the manufac- 'turer for'telescopingthe two at the bag factory. ,Such a bag carries what is called a satchelbottom 33 (herein used as a top) shown in Fig. 6. This satchel part andvalve extend from the upper edge I5 of the cover J3 (Figs. 5 and '6').The lower ends of the bag members |A and cover l3 are'closed by a singleseam (not shown) as in the case of construction shown in Figs. 1 and 2.After filling up to a point somewhat below the upper edge l5 of thecover i3, the satchel part 33 is rolled down as indicated at 31 in Fig.'7 and a top seam '39 applied to closing the cover edges i5. In thiscase, as the inner bag IA is filled, the outer cover, l3 and the bag I-Aexpand together.

In viewof the above, it will be seen that the several objects of theinvention are achieved cover, each being ,of tubular form, certain endsof said sleeve and cover being adjacent one another, a common sewed seamclosing both of said adjacent ends, the width of the fiat cover beingsubstantially greater than thatof the flat gusseted sleevewith thelatter being centered in the former by said scam, the opposite end ofsaid sleeve extending substantially beyond the opposite end .of saidcover, the sleeve being connected to the cover only at said seam andfree of any longitudinal attachment thereto, the perimeters of thesleeve and the cover being related so that the sleeve when loaded andwithout stretching its material :entirely fills out the cover and thelatter when loaded forms substantially all of the girthwise supportagainst radial forcesof the bag contents.

' CHARLES V. BRADY.

